Am 24.02.2011 10:01, schrieb Peter Otten:
> How do you prevent that a malicious source sends you
>
> my_string = 'calc_area(__import__("os").system("rm important_file") or 100,
> 200)'
>
> instead?
By using something like
http://code.activestate.com/recipes/496746-restricted-safe-eval/ . With
a combination of AST inspection and restricted builtins you can create a
restricted eval function that e.g. doesn't allow function calls, raising
or excepting exceptions and prevents access to members with a leading _.
Christian
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